package filter;

import Utils.BaseMessage;
import com.alibaba.fastjson.JSON;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

/**
 * 前端页面登陆禁止访问的页面
 */
@WebFilter(filterName = "isNoLoginPageFilter", urlPatterns = {
        "/index.jsp"
})
public class isNoLoginPageFilter implements Filter {
    public void destroy() {
    }

    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;
        HttpSession session = request.getSession();
        if (session.getAttribute("userMsg") != null) {
            response.sendRedirect(request.getServletContext().getContextPath() + "/center/");
            return;
        }
        chain.doFilter(req, resp);
    }

    public void init(FilterConfig config) throws ServletException {

    }

}
